如何从List< dynamic>（）获取数据？ [英] How to fetch data from List<dynamic>()?

问题描述

我的代码是这样的

var eventDocs = new List<dynamic>();     
foreach (var node in eventtypeNode.GetDescendantNodes())
{
    string files = node.GetProperty("document").Value;
    eventDocs.Add(new { Id = node.Id, Name = node.Name, CreatedOn = node.CreateDate, Path = files });
}

这很好。现在，我试图从此动态列表中获取数据

This works good. Now I am trying to fetch the data out of this dynamic list

foreach (var eventDoc in eventDocs)
{
     eventDoc.----  //nothing comes on intellisence
}

没有来智能感知？我做错什么了吗？

Nothing comes on IntelliSense? Am I doing anything wrong?

推荐答案

您不会从Intellisense那里得到任何东西，因为您已经得到了列表<动态> 。您是在说：我不知道在编译时此列表将包含什么。当我访问元素的成员时，只需在执行时动态绑定它即可。

You won't get anything from Intellisense precisely because you've got a List<dynamic>. You're saying, "I don't know at compile-time what this list will contain. When I access members of the elements, just bind that dynamically at execution-time."

鉴于您将绑定时间推迟到执行时间，为什么您会惊讶于Intellisense无法分辨列表中的内容？

Given that you're deferring binding to execution time, why would you be surprised that Intellisense can't tell what will be in the list?

对我来说，您应该更改代码以使用LINQ查询开头-然后您可以拥有一个具有已知元素类型的列表，该类型将是匿名类型。

It looks to me like you should change your code to use a LINQ query to start with - then you can have a list with a known element type, which will be an anonymous type.

var eventDocs = eventtypeNode.GetDescendantsNodes()
      .Select(node => new { Id = node.Id, 
                            Name = node.Name, 
                            CreatedOn = node.CreateDate,
                            Path = node.GetProperty("document").Value })
      .ToList();

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